Got to Terra's final boss in Kingdom Hearts Birth by Sleep. The bosses in this game are so bad. Since they have no rhyme or reason for deciding they've had enough of you attacking, you're forced to be reactive so that you don't just get bodied by them deciding to counter on a whim. It's a pity, because some of the game's stuff is pretty good.
It's...also kinda the beginning of the downfall of Kingdom Hearts, due to being the beginning of the second arc. The Xehanort stuff feels like it jumped the shark, even if there's nothing wrong with it yet, and its writing is actually good.